Velodyne SPL-1200 Series II - Manual (Page 15)

• Signal sensing auto turn on/off (defeatable)
• Variable volume control
• Selectable phase control (0° or 180°)
• Frequency response of 28 - 120 Hz (SPL-800 Series II), 24 - 120Hz (SPL-
1000 Series II), 22-120Hz (SPL-1200 Series II)
• Magnetically shielded for video use (SPL-1000 Series II and SPL-1200
Series II)
• Multiple staggered low-pass crossovers; 12dB/octave initial, 48dB/
octave ultimate
• Driver Displacement Control circuit prevents over excursion and amp
clipping
• Blue power indicator LED
• High-excursion EPDM rubber surround
• Oversized spider for linearity at high excursion
Prepare for Installation
Your new Velodyne subwoofer provides for a number of installation
options. Read all the installation information below in order to determine
which installation option is best for your system. Remember to perform
all installation procedures with system power turned off to prevent
possible damage.
Placement
True subwoofers operate at extremely low frequencies which are primarily
omni-directional. While it is recommended that the subwoofer be placed
on the same plane as the satellite speakers, room and system conditions
often dictate otherwise. Keep in mind that frequency response and output
level can be drastically influenced by placement, depending on the
acoustic properties of the listening room. Typically, the optimum location
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Product Features
• 8" (6.5" piston diameter) subwoofer with 2.5" high-temp voice coil and
107 ounce magnet/204 ounce motor structure; 10" (8" piston diameter)
or 12" (9.7" piston diameter) subwoofer with 3" voice coil and 162 ounce
magnet/346 ounce motor structure
• Built-in 2000 watts Dynamic/1000 watts RMS high efficiency class D
amplifier
• Adjustable (40 to 120Hz) low-pass crossover (defeatable)
• Line-level (RCA) inputs and outputs
• Speaker-level inputs with 5 way binding post connections
Care of Your Subwoofer
Your Velodyne subwoofer does not require any regular maintenance.
Normal dusting or cleaning of the surface for appearance purposes are all
that is required. We suggest you avoid any harsh detergents or chemicals
when cleaning the cabinet. Abrasives, detergents, or cleaning solutions
may damage the finish on the cabinet. We recommend using only a damp
cloth to clean the cabinet.
During normal conditions, your new subwoofer may be left on continuously
without any problems. The unit is equipped with a signal-sensing turn on/
off that will automatically turn on the unit when a signal is present at the
inputs and turn off the unit after several minutes when there is no longer
any signal at the inputs. If you plan to leave the subwoofer unused for an
extended period of time, we recommend that you turn off the master power
switch on the rear panel.
The unit is protected against:
1) Overdriving the speaker or amplifier.
2) Overheating the amplifier.
3) Excessive drop in power line voltage.
The first type of protection circuitry which prevents overdriving of the
speaker or amplifier operates constantly without being audible under most
situations. In some extreme situations (sustained high output levels such
as pro sound usage), the unit may shut down momentarily. This indicates
operation of the thermal or undervoltage protection circuitry. If this should
happen, you should reduce the volume setting or shut the unit off until
normal operating conditions return. You may also want to plug the unit
into a different wall outlet, as dropping power line voltage will be most
noticeable under strenuous conditions and may result in the unit shutting
down intermittently.
Protection Circuitry
Your new subwoofer is equipped with special protection circuitry to
provide maximum performance with greatest reliability.
strands or frayed wires which may result in a short, which may damage your
equipment. Cables of extremely large size are typically not required.
Extremely large gauge wire may not properly fit in the binding posts,
resulting in a poor connection and possible short circuits.